GONRACIN

is it true that 13b rotories can redline at 13 000 rpm? I was told this but I am pretty sure it is not true.......help?

maxpesce

Full Race motors can - Street motors run 7000-8000 RPM Redlines

Bridgeported

I've heard of some race engines as high as 14,000 rpm. Pretty rare though.
Stock engines are 7,000-8,000 as maxpesce pointed out.
Some guys have their street engines up to 10,500-11,000 rpm, not very commanly though.

cpurvis

At the Jim Russell Racing School we ran stock factory remanufactured motors with stock ports & stock lower intake manifolds to 10,000 rpm all the time. The cars had racing beat headers & a single weber 55 DCOE on them.

Bridgeported

Wouldn't the rotors need to be clearanced to safely run up to 10,000 rpm?
Also, I think the stock apex seals begin to float around 9000 rpm.

cpurvis

well, all I can tell you is that in my year there we never had an engine failure (okay - a couple formula ford's blew up, but the 13b's never had any problems). The only time we bought a new engine was when building a new car from scratch.

These cars were run at most maybe 10 hours a week so maybe that contributed to their longevity...

Engberg

It is much easier to run a rotary to those high rpms than a typical piston engine. Typically for street applications not many people push the redline up, but the racing motors (since the original rotaries) have run over 10K. Much less momentum change in a rotary which means less inertial stress, which is the main force in a piston engine, more so than the forces of combustion!